164171389 has 2 divisors, whose sum is σ = 164171390. Its totient is φ = 164171388.

The previous prime is 164171327. The next prime is 164171393. The reversal of 164171389 is 983171461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157628025 + 6543364 = 12555^2 + 2558^2 .

It is an emirp because it is prime and its reverse (983171461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164171389 - 2²⁷ = 29953661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164177389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82085694 + 82085695.

It is an arithmetic number, because the mean of its divisors is an integer number (82085695).

Almost surely, 2^164171389 is an apocalyptic number.

It is an amenable number.

164171389 is a deficient number, since it is larger than the sum of its proper divisors (1).

164171389 is an equidigital number, since it uses as much as digits as its factorization.

164171389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 164171389 is about 12812.9383437212. The cubic root of 164171389 is about 547.5609784532.

The spelling of 164171389 in words is "one hundred sixty-four million, one hundred seventy-one thousand, three hundred eighty-nine".